function addNavigationCtrl() {
  var navControl = ge.getNavigationControl();
  var screenXY = navControl.getScreenXY();

  //alert('Moving control to top right');
  screenXY.setXUnits(ge.UNITS_INSET_PIXELS);
  screenXY.setYUnits(ge.UNITS_INSET_PIXELS);  
  navControl.setVisibility(ge.VISIBILITY_AUTO);
}
